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Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
The following is a list of major snow and ice events in the United States that have caused noteworthy damage and destruction in their wake. The categories presented below are not used to measure the strength of a storm, but are rather indicators of how severely the snowfall affected the population in the storm's path.
Thursday's weather will feature an Arctic blast for the Midwest and Northeast and still more lake-effect snow for the Great Lakes. Cold air associated with a high-pressure area will move over the ...
The National Weather Service predicted that there was a moderate risk of "hazardous cold" across the Northern Plains, with low temperatures that could get down to -10 degrees and feel even colder ...
Yes we know the calendar still says it's fall, but if you're already sick of winter's cold, there is some good news on the way: The bitter Arctic blast that's overspread much of the central ...
On weather maps, the surface position of the cold front is marked by a blue line with triangles pointing in the direction where cold air travels and it is placed at the leading edge of the cooler air mass. [2] Cold fronts often bring rain, and sometimes heavy thunderstorms as well. Cold fronts can produce sharper and more intense changes in ...
Winter storm weather is forecast to bring snow to different parts of the country in the days around Thanksgiving 2024, potentially interrupting travel.